I know two companies, one is Haosha Fitness in Guo Rui (Xihua Street) and the other is Haosha Fitness in Fuguiyuan Community (Donghua Street). They are not very big. If you like swimming, I recommend going to Fugui Garden, where the swimming pool is well lit and ventilated. As for musical instruments, there are not many kinds. Fuguiyuan Haosha Fitness Tel: 67 1693 10.
I hope it helps you!